- Implementations of SSH v1 solved those issues, but only briefly. Primarily, it encrypted the traffic so hackers could not easily sniff out critical data like passwords. Unfortunately, SSH v1 was found to have several vulnerabilities mainly a buffer overflow and an unauthorized session recovery flaw.
- Implementation of SSH v2 provided many solutions to those vulnerabilities. It also increased the complexity of the encryption algorithms and added support for public key certificates.
- Various vendor and security organizations require SSH v2 be used instead of SSH v1. However, many older devices still support SSH v1. Users must configure their devices and disable fallback to SSH v1 to make sure it is not used as a backup to SSH v2.
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